Shang‐Chih Lin

National Taiwan University of Science and Technology

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Kao‐Shang Shih

Fu Jen Catholic University

Chun‐Ming Chen

Chia-Yi Christian Hospital

Yu-Kun Xu

National Taiwan University of Science and Technology

Ching‐Shiow Tseng

National Central University

Chi-Pin Hsu

National Taiwan University of Science and Technology

Lulin Wang

First Affiliated Hospital of Guangzhou Medical University

Tzu‐Tsao Chung

National Taiwan University of Science and Technology

Che‐Wei Liu

Cathay General Hospital

Sheng‐Mou Hou

Memorial Hospital

Tung‐Wu Lu

Kunming Children's Hospital

Cooperative Institutions

National Taiwan University of Science and Technology

National Taiwan University

National Yang Ming Chiao Tung University

Taipei Medical University

National Taiwan University Hospital

Chang Gung Memorial Hospital

National Central University

Chang Gung University

National Yang Ming University Hospital

Memorial Hospital of South Bend

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Design and fabrication of large area vat photopolymerization 3D printing system using a 32-inch quasi-collimated visible backlight module with local dimming control

Additive manufacturing (2023)

Ding‐Zheng Lin Ping-Hung Yu Zi-Jain Zhang Yu‐Cheng Chen Shang‐Chih Lin

Backlight

Collimated light

10.1016/j.addma.2023.103665

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Citations (5)

Optimal Design of Pedicle Screw and Its Application to the Osteoporotic Spine

WORLD SCIENTIFIC eBooks (2021)

Po-Quang Chen Shang‐Chih Lin

10.1142/9789811220814_0012

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Citations (0)

Biomechanical Effects of Cage Positions and Facet Fixation on Initial Stability of the Anterior Lumbar Interbody Fusion Motion Segment

Spine (2014)

Dueng‐Yuan Hueng Tzu‐Tsao Chung Wen-Hsien Chuang Chi-Pin Hsu Kuan-Nien Chou

An in vitro biomechanical study using porcine lumbar segments as specimens.To evaluate the effects of interbody cage support and endplate strength on the stability of instrumented segments.The anterior lumbar interbody fusion (ALIF) cage is widely used to restore disc height and support the anterior column. Transpedicle or posterior spinal fusion or facet screw fixation (FSF) can improve the stability of the vertebra-instrumented segments. The cage position can affect the anterior support and initial stability of the ALIF region, but there is no consistent data on its biomechanical effects on ALIF and ALIF/FSF segments.Nine variations of 3 instrumentation modes (intact, ALIF, ALIF/FSF) and 3 cage positions (type I, anterolateral; type II, mediolateral; and type III, posteromedial) are tested under 5 lumbar motions. The range of motion and axial displacement are used as comparison indices for the different variations.The cage placement serves as support for the intervertebral loads while the posterior fixation behaves as lever to further enhance the anterior support. At the endplate-cage interfaces, the endplate strength directly affects the cage subsidence. Type III exhibits higher stability for standing due to the greater strength of the endplate in the posterior region. Otherwise, type I consistently has higher stability for all other types of motion.The initial stability of the ALIF region is affected by the moment arm and the mechanical strength of the engaged endplates. Type I has greater moment arm and provides more efficient support to the instrumented segments. Endplate strength provides an ability to withstand lumbar loads and suppress the cage subsidence. Bone quality at the endplate-cage interfaces must therefore be cautiously evaluated preoperatively.N/A.

Cage

Facet (psychology)

Biomechanics

Vertebra

Neutral zone

10.1097/brs.0000000000000336

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Citations (22)

Corrosion Protection of Metal Matrix Composites

F. Mansfeld Shang‐Chih Lin H. Shih

Abstract : Corrosion protection of Al alloys, Al-based metal matrix composites (MMCs), and Al-Li alloy by conversion coatings, anodized layers, polymer coatings, and chemical passivation in CeCl3 has been evaluated in a simulated marine environment (0.5 N NaCl) by electrochemical impedance spectroscopy (EIS). Conversion coatings, anodizing, polymer coatings have been evaluated for MgAZ31B. Chromate conversion coatings (Alodine 600) provided corrosion protection for Al/SiC and Al/Gr MMCs, but were not as effective as for Al 6061. For Al/SiC it was observed that sulfuric acid anodizing did not produce the corrosion resistance obtained for the Al 6061. The corrosion resistance for hard anodized Al/SiC was less than that for conventional anodized Al/SiC. Keywords: Corrosion protection, Polymer coatings, Conversion coatings, Anodizing Al alloys, Magnesium, Localized corrosion, Passivation, Electrochemical techniques.

Anodizing

Passivation

Conversion coating

Chromate conversion coating

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Citations (2)

Gender differences in femoral trochlea morphology

Knee Surgery Sports Traumatology Arthroscopy (2020)

Chi-Pin Hsu Pei‐Yuan Lee Hung‐Wen Wei Shang‐Chih Lin Yung‐Chang Lu

Sulcus

Groove (engineering)

10.1007/s00167-020-05944-3

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Citations (18)

Clinical result of sintered bovine hydroxyapatite bone substitute: analysis of the interface reaction between tissue and bone substitute

Journal of Orthopaedic Science (2010)

Wen-Chi Tsai Chun-Jen Liao Chen‐Tu Wu Chieh‐Yu Liu Shang‐Chih Lin

Von Kossa stain

Bone tissue

10.1007/s00776-009-1441-9

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Citations (17)

Effects of stemmed and nonstemmed hip replacement on stress distribution of proximal femur and implant

BMC Musculoskeletal Disorders (2014)

Chun‐Ming Chen Wen-Chi Tsai Shang‐Chih Lin Ching‐Shiow Tseng

Despite improvements in shape, material, and coating for hip stem, both stress shielding and aseptic loosening have been the major drawbacks of stemmed hip arthroplasty. Some nonstemmed systems were developed to avoid rasping off the intramedullary canal and evacuating the bone marrow due to stem insertion. In this study, the finite-element models of one intact, one stemmed, and two nonstemmed femora with minimal removal of the healthy neck were investigated to evaluate their biomechanical effects. The resurfacing (ball-shaped) and fitting (neck-shaped) systems were respectively selected as the representative of the ready- and custom-made nonstemmed implants. The stress distribution and interface micromotion were selected as the comparison indices. The results showed that stress distributions of the two nonstemmed femora are consistently more similar to the intact femur than the stemmed one. Around the proximal femur, the stem definitely induces the stress-shielding phenomenon of its counterparts. The fitting system with the anatomy-shaped cup can make intimate contact with the neck cortex and reduce the bone-cup micromotion and the implant stress. Comparatively, the reamed femoral head provides weaker support to the resurfacing cup causing higher interfacial micromotion. The reserved femoral neck could act as the load-transferring medium from the acetabular cup, femoral neck, to the diaphysial bone, thus depressing the stress-shielding effect below the neck region. If the hip-cup construct can be definitely stabilized, the nonstemmed design could be an alternative of hip arthroplasty for the younger or the specific patients with the disease limited only to the femoral head.

Sports medicine

10.1186/1471-2474-15-312

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Citations (9)

Arrangement of Joint Distraction and Hinge Alignment during Elbow Dynamization Using an Arthrodiatasis Fixator

Journal of Medical and Biological Engineering (2013)

Wei‐Shiun Lee Ching-Hong Tan Shang‐Chih Lin Yeung-Jen Chen Ching‐Kong Chao

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DESIGN STRATEGY OF THREE-DIMENSIONAL PRINTED CAGES TO REDUCE IMPACT-INDUCED DEBRIS ALONG THE LOAD-TRANSFERRING PATH

Journal of Musculoskeletal Research (2020)

Shang‐Chih Lin Yu‐Pao Hsu Ching‐Hsiao Yu Chun‐Ming Chen Po-Quang Chen

Peri-implant debris certainly lead to osteolysis, necrosis, pseudotumor formation, tissue granulation, fibrous capsule contractions, and even implant failure. For the three-dimensional (3D) printed cage, impaction during cage insertion is one of the most potential sources of fracture debris. A finite-element study was carried out to reduce the impact-induced debris of the 3D-printed cage. This study focused on the design strategy of solid and cellular structures along the load-transferring path. Using the finite-element method, the cellular structure of the transforaminal lumbar interbody fusion (TLIF) cage was systematically modified in the following four variations: a noncellular cage (NC), a fully cellular (FC) cage, a solid cage with a cellular structure in the middle concave (MC) zone, and a strengthened cage (SC) in the MC zone. Three comparison indices were considered: the stresses at the cage-instrument interfaces, in the MC zone, and along the specific load-transferring path. The NC and FC were the least and most highly stressed variations at the cage-instrument interfaces and in the MC zone, respectively. Along the entirely load-transferring path, the FC was still the most highly stressed variation. It showed a higher risk of stress fracture for the FC cage. For the MC and SC, the MC zone was consistently more stressed than the directly impacted zone. The further strengthened design of the SC had a lower peak stress (approximately 29.2%) in the MC zone compared with the MC. Prior to 3D printing, the load-transferring path from the cage-instrument interfaces to the cage-tissue interfaces should be determined. The cage-instrument interfaces should be printed as a solid structure to avoid impact-induced fracture. The other stress-concentrated zones should be cautiously designed to optimize the coexistence strategy of the solid and cellular structures.

Cage

Impaction

10.1142/s0218957720500219

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Citations (0)

Removal of fixation construct could mitigate adjacent segment stress after lumbosacral fusion: A finite element analysis

Clinical Biomechanics (2017)

Yueh-Ying Hsieh Chia-Hsien Chen Fon-Yih Tsuang Lien-Chen Wu Shang‐Chih Lin

Combined usage of posterior lumbar interbody fusion and transpedicular fixation has been extensively used to treat the various lumbar degenerative disc diseases. The transpedicular fixator aims to increase stability and enhance the fusion rate. However, how the fused disc and bridged vertebrae respectively affect adjacent-segment diseases progression is not yet clear.Using a validated lumbosacral finite-element model, three variations at the L4-L5 segment were analyzed: 1) moderate disc degeneration, 2) instrumented with a stand-alone cage and pedicle screw fixators, and 3) with the cage only after fusion. The intersegmental angles, disc stresses, and facet loads were examined. Four motion tests, flexion, extension, bending, and twisting, were also simulated.The adjacent-segment disease was more severe at the cephalic segment than the caudal segment. After solid fusion and fixation, the increase in intersegmental angles, disc stresses and facet loads of the adjacent segments were about 57.6%, 47.3%, and 59.6%, respectively. However, these changes were reduced to 30.1%, 22.7%, and 27.0% after removal of the fixators. This was attributed to the differences between the biomechanical characteristics of the fusion and fixation mechanisms.Fixation superimposes a stiffer constraint on the mobility of the bridged segment than fusion. The current study suggested that the removal of spinal fixators after complete fusion could decrease the stress at adjacent segments. Through a minimally invasive procedure, we could reduce secondary damage to the paraspinal structures while removing the fixators, which is of utmost concern to surgeons.

Lumbosacral joint

Biomechanics

Degenerative Disc Disease

10.1016/j.clinbiomech.2017.02.011

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Citations (43)